java读取mysql数据了过大，如何实现分页读取，求代码

Question

sql = "SELECT id, name, url ,country FROM websites";/*需要从表里面读取的数据*/
ResultSet rs = stmt.executeQuery(sql);

String fn = "F://NEWtest//again1.txt";
wf(fn,"ID ,站点名称, 站点,country.");
while(rs.next()){

    int id  = rs.getInt("id");            
    String name = rs.getString("name");
    String url = rs.getString("url");
    String country = rs.getString("country");



    System.out.print("ID: " + id);

    System.out.print(", 站点名称: " + name);

    System.out.print(", 站点 URL: " + url);
    System.out.print(", country: " + country);

    System.out.print("\n");
    wf(fn,id+"," + name+ "," + url+ "," + country);
}
    这是读取数据库的代码，需要分页读取的代码，麻烦详细些，我刚刚接触java，谢谢

Answer 1

下面方法select(String page)的page是前台传到后台的 ，然后处理下page从数据库中分页顺序取出数据public JSONArray select(String page) {    int limit = 10;     JSONArray jsonArr = new JSONArray();     Statement stmt = null;     int start = (Integer.valueOf(page).intValue()-1) * limit;     String sql = "SELECT id, name, url ,country FROM websites ORDER BY CREATTIME DESC LIMIT " + start + ",10;";     ResultSet rs = stmt.executeQuery(sql);             while(rs.next()){ int id  = rs.getInt("id");             String name = rs.getString("name"); String url = rs.getString("url"); String country = rs.getString("country"); System.out.print("ID: " + id); System.out.print(", 站点名称: " + name); System.out.print(", 站点 URL: " + url); System.out.print(", country: " + country); System.out.print("\n"); wf(fn,id+"," + name+ "," + url+ "," + country); }}